Tropical Aqua-Alkal pH Plus water treatment

Tropical Aqua-Alkal pH Plus is a freshwater aquarium treatment designed to raise and stabilise pH levels in tanks housing fish that require alkaline conditions. It is an essential tool for keepers maintaining biotope setups where water chemistry is non-negotiable for fish health and behaviour.

Why pH Matters in Alkaline Biotopes

Many popular freshwater species are adapted to naturally alkaline environments and will not thrive outside of them. Malawi cichlids from the mbuna group, Tropheus from Lake Tanganyika, and Central American cichlids all require elevated pH to display good health, strong colouration, and natural spawning behaviour. Keeping pH within the correct range is not optional for these fish — it is a fundamental husbandry requirement.

What This Treatment Does

Tropical Aqua-Alkal pH Plus raises pH in freshwater aquariums and actively works to prevent the fluctuations that occur naturally over time in a running tank. Unchecked pH drift in alkaline setups can stress fish, suppress immune function, and inhibit breeding. This treatment addresses that directly, helping to maintain stable conditions between water changes and routine maintenance.

Dosing and Application

When adding directly to a running aquarium, monitor pH using a reliable test kit throughout the process. Daily pH shifts should not exceed 0.2 pH to avoid stressing livestock. For the most controlled approach, prepare and adjust water in a separate container before gradually introducing it to the tank — this is particularly important in established setups with sensitive fish.

Recommended Alongside

To dose accurately and monitor results, use alongside a compatible pH test kit. Tropical's own Test 6-in-1, Test pH 4.5–9.5, Test pH 6.0–7.8, and Test GH/KH strips or kits are all suitable companions for this treatment and will help you track water parameters with confidence.

Tropical Aqua-Alkal pH Plus is available in two sizes to suit different tank volumes and maintenance routines. Choose the option that fits your setup from the variants listed on this page.